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https://github.com/c64scene-ar/llvm-6502.git
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fe11a97fcd
the traditional LLI interpreter git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5125 91177308-0d34-0410-b5e6-96231b3b80d8
79 lines
2.7 KiB
C++
79 lines
2.7 KiB
C++
//===-- Support.cpp - Support routines for interpreter --------------------===//
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//
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// This file contains support routines for the interpreter core.
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//
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//===----------------------------------------------------------------------===//
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#include "Interpreter.h"
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#include "llvm/SymbolTable.h"
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#include "llvm/Assembly/Writer.h"
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#include "llvm/Module.h"
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#include <iostream>
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using std::cout;
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//===----------------------------------------------------------------------===//
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//
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// LookupMatchingNames helper - Search a symbol table for values matching Name.
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//
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static inline void LookupMatchingNames(const std::string &Name,
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SymbolTable &SymTab,
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std::vector<Value*> &Results) {
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// Loop over all of the type planes in the symbol table...
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for (SymbolTable::iterator I = SymTab.begin(), E = SymTab.end(); I != E; ++I){
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SymbolTable::VarMap &Plane = I->second;
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// Search the symbol table plane for this name...
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SymbolTable::VarMap::iterator Val = Plane.find(Name);
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if (Val != Plane.end())
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Results.push_back(Val->second); // Found a name match!
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}
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}
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// LookupMatchingNames - Search the current function namespace, then the global
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// namespace looking for values that match the specified name. Return ALL
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// matches to that name. This is obviously slow, and should only be used for
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// user interaction.
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//
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std::vector<Value*> Interpreter::LookupMatchingNames(const std::string &Name) {
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std::vector<Value*> Results;
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Function *CurMeth = getCurrentMethod();
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if (CurMeth) ::LookupMatchingNames(Name, CurMeth->getSymbolTable(), Results);
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::LookupMatchingNames(Name, getModule().getSymbolTable(), Results);
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return Results;
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}
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// ChooseOneOption - Prompt the user to choose among the specified options to
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// pick one value. If no options are provided, emit an error. If a single
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// option is provided, just return that option.
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//
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Value *Interpreter::ChooseOneOption(const std::string &Name,
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const std::vector<Value*> &Opts) {
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switch (Opts.size()) {
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case 1: return Opts[0];
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case 0:
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cout << "Error: no entities named '" << Name << "' found!\n";
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return 0;
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default: break; // Must prompt user...
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}
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cout << "Multiple entities named '" << Name << "' found! Please choose:\n";
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cout << " 0. Cancel operation\n";
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for (unsigned i = 0; i < Opts.size(); ++i) {
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cout << " " << (i+1) << ".";
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WriteAsOperand(cout, Opts[i]) << "\n";
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}
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unsigned Option;
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do {
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cout << "lli> " << std::flush;
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std::cin >> Option;
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if (Option > Opts.size())
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cout << "Invalid selection: Please choose from 0 to " << Opts.size()
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<< "\n";
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} while (Option > Opts.size());
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if (Option == 0) return 0;
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return Opts[Option-1];
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}
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